1. Application of geostatistics to obtain the geological profile by seismic prospecting (in Japanese);Aoki,1989
2. Fukui, K., Okubo, S., Homma, N., 1996. Estimation of rock strength with TBM cutting force and site investigation at Niken-goya tunnel (in Japanese). Resour. Mater. 112(5), 303–308
3. Examination of the application of Drill Logging to predict ahead of the tunnel face (in Japanese);Shirasagi,1999
4. Development of TBM navigator introducing geophysical and geological data and application (in Japanese;Shirasagi,2000
5. Evaluation of the geological condition ahead of the tunnel face by geostatistical techniques using TBM driving data (in Japanese);Yamamoto,2001